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並前往https://theconversation.com/ive-always-wondered-why-are-the-stars-planets-and-moons-round-when-comets-and-asteroids-arent-160541

why are the stars, planets and moons round, when comets ...

For solid objects, that force is opposed by the strength of the object itself. ... But to answer it simply, the reason big astronomical objects ...

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